Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"142959 - Piptatheropsis pungens (Torrey ex Sprengel) Romaschenko, P. M. Peterson & Soreng, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-199286. Accessed 13 Mar. 2025.